This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 93 |
| 5 | 1837 |
| 6 | 64543 |
| 7 | 3754807 |
| 8 | 364026729 |
| 9 | 57155586089 |
| 10 | 13507554452859 |
| 11 | 4491954229297987 |
| 12 | 2028035990665237525 |
| 13 | 1227168186637813749445 |
| 14 | 987585965101526606515191 |
| 15 | 1041500427833355704666149103 |